BOTANICAL SUB.JECTS. 



263 



Fig. 99. Bud on the leaf-stalk of 



Fig. 100. Bud on leaf stalk of 

 Pteris aquilina (after Goebel, Fig. 156). the same, 



(a, a, a.) Buds on the petiole of fern-leaves.* 



Fig. 101. Bud on the petiole of Aspidmm filix mas (Goebel's "Outlines 

 of Classif.," Fig. 158). 



Vide also a more developed biid in B, k of the same Fig. in Goebel's 

 " Outlines." 



It is clear to me that the anatropous ovule is only a branch 

 bud, with a, circiymte vernation, the funicle rej^resenting the 

 stem, which adheres to the bud-scales, represented by the 

 integuments, while the nucleus is the terminal bud. In the case 

 of Hippuris, the petiole (d) is dichotomous, one branch developing 



* These correspond to axillary buds in phaenogams, and to (a) in 

 Sargassum, Fig. 92. 



